<?php
/**
 * Cloud run dispatcher.
 *
 * @package TwoUA_SEO_Release_Guard
 */

declare(strict_types=1);

namespace TwoUA\SeoReleaseGuard;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

final class RunDispatcher {
	private RunApiClient $client;
	private PairingService $pairing;
	private RunCapabilityCache $capabilities;

	public function __construct(
		RunApiClient $client,
		PairingService $pairing,
		RunCapabilityCache $capabilities
	) {
		$this->client       = $client;
		$this->pairing      = $pairing;
		$this->capabilities = $capabilities;
	}

	public function dispatch( ReleaseEvent $event ): ?RunSummary {
		if ( ! $this->pairing->is_connected() ) {
			return null;
		}

		$capabilities = $this->capabilities->get();
		if ( ! $capabilities instanceof RunCapabilities ) {
			$capabilities = $this->client->capabilities();
			$this->capabilities->store( $capabilities );
		}
		if ( ! $capabilities->permits( $event ) ) {
			return null;
		}

		$urls = array_slice( $event->urls, 0, $capabilities->max_urls );
		return $this->client->queue( $event->with_urls( $urls ), $this->modules() );
	}

	private function modules(): ModuleSelection {
		$settings = get_option( Options::SETTINGS, array() );
		$settings = is_array( $settings ) ? $settings : array();
		$mapping  = array(
			'release_guard' => 'release_guard',
			'sitemap_watch' => 'sitemap_indexability',
			'schema_watch'  => 'schema_regression',
		);
		$modules  = array();
		foreach ( $mapping as $setting => $module ) {
			if ( ! empty( $settings[ $setting ] ) ) {
				$modules[] = $module;
			}
		}

		return new ModuleSelection( array() === $modules ? array( 'release_guard' ) : $modules );
	}
}